Hi
I'm interested in using DirectFB from Java. I'm fairly new to JNI, but one
problem that struck me was how to maintain a mapping from native pointers
(which track native objects such as IDirectFBWindow objects) and their Java
counterparts. The problem being, of course, that the native pointer could be
32 or 64 bits depending on what platform you're running on in, and Java
provides no datatype for handling pointers.
I've just taken a look at the kawt code from the DirectFB CVS, and it seems to
me that you are just assuming native pointers are always 32 bits. For
example:
void
Java_java_awt_Toolkit_wndToBack ( JNIEnv* env, jclass clazz, jint nativeHandle
)
{
IDirectFBWindow *wnd = (IDirectFBWindow*) nativeHandle;
DEBUGMSG(__FUNCTION__"\n");
wnd->LowerToBottom( wnd );
}
Since a jint is always 32 bits, this will only work on 32-bit platforms.
Right? Or am I missing something?
Cheers,
Rich
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